Hepatic MR imaging with a dynamic contrast-enhanced isotropic volumetric interpolated breath-hold examination: Feasibility, reproducibility, and technical quality
Hepatic MR imaging with a dynamic contrast-enhanced isotropic volumetric interpolated breath-hold examination: Feasibility, reproducibility, and technical quality
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DOI：
10.1148/radiology.215.2.r00ma16365
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发表时间：
2000-05-01
期刊：
影响因子：
19.7
通讯作者：
Weinreb, JC
中科院分区：
文献类型：
--
作者：
Lee, VS;Lavelle, MT;Weinreb, JC
目得：评价动态对比剂增强各向同性三维（3D）容积内插屏气肝脏磁共振（MR）成像检查的可行性、可重复性和技术质量。材料和方法：50例患者接受3D扰相梯度回波成像（4.2/1.8 [重复时间毫秒/回波时间毫秒];翻转角，12度;三个方向内插;间歇性脂肪饱和;像素大小在所有维度上小于或等于2.5 mm），其中通过使用造影剂的测试团，第一次增强采集针对肝动脉优势进行定时。确定了图像质量的定性和定量措施。评估了动脉和静脉解剖结构的模式。10例患者（20%）在6个月内进行了重复成像，并评估了重复性。结果：非增强和动脉，门静脉和平衡相研究的肝脏对比噪声比平均分别为13.0 +/- 12.6（SD），17.4 +/- 11.8，30.4 +/- 16.2和28.6 +/- 21.1。在动脉期，肝脏平均增强了门静脉期测量的最大增强的29%：肝血管解剖变异的分布与已发表文章中引用的相似。重复研究的图像质量没有显着差异时，与原始study.CONCLUSION相比：高质量的动脉相三维容积内插屏气图像时，可以得到可靠的和可重复的定时使用测试剂量的造影剂。
PURPOSE: To evaluate the feasibility, reproducibility, and technical quality of a dynamic contrast material-enhanced isotropic three-dimensional (3D) volumetric interpolated breath-hold hepatic magnetic resonance (MR) imaging examination.MATERIALS AND METHODS: Fifty patients underwent 3D spoiled gradient-echo imaging (4.2/1.8 [repetition time msec/echo time msec]; flip angle, 12 degrees; interpolation in three directions; intermittent fat saturation; pixel size less than or equal to 2.5 mm in all dimensions) before and dynamically after administration of gadopentetate dimeglumine, with the first enhanced acquisition timed for hepatic arterial dominance by using a test bolus of contrast material. Qualitative and quantitative measures of image quality were determined. Patterns of arterial and venous anatomy were assessed. Ten patients (20%) underwent repeat imaging within 6 months, and reproducibility was evaluated.RESULTS: Hepatic contrast-to-noise ratios for nonenhanced and arterial, portal venous, and equilibrium phase studies averaged 13.0 +/- 12.6 (SD), 17.4 +/- 11.8, 30.4 +/- 16.2, and 28.6 +/- 21.1, respectively. During arterial phase, the liver enhanced a mean of 29% of the maximal enhancement as measured during portal Venous phase: Hepatic vascular anatomic variants were comparable in distribution to those cited in published articles. Repeat studies were not significantly different in image quality when compared with original studies.CONCLUSION: High-quality arterial phase 3D volumetric interpolated breath-hold images can be obtained reliably and reproducibly when timed by using a test dose of contrast material.